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Finding the Fourth Proportional to 188,503.85, 260,128.71 and 103,620.30

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Solution

The fourth proportional to 188,503.85, 260,128.71 and 103,620.30 is: 142,992.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,503.85 : 260,128.71 = 103,620.30 : x
  2. Step 2: Convert to fraction form
    188,503.85/260,128.71 = 103,620.30/x
  3. Step 3: Cross multiply
    188,503.85x = 260,128.71 × 103,620.30
  4. Step 4: Simplify right side
    188,503.85x = 26,954,614,968.81
  5. Step 5: Solve for x
    x = 26,954,614,968.81/188,503.85
  6. Step 6: Final answer
    x = 142,992.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.